Question

Efetue: A) (+5) ∙ (+ 3) = B) (+ 4) ∙ (– 5) = C) (– 8) ∙ (+ 4) = = D) (– 6) ∙ (– 7) = = E) (– 2) ∙ (+4) ∙ (+3) ∙ (– 1) = F) (– 5) ∙ (– 6) ∙ (– 2) = G) 2 ∙ (− 3) ∙ (+ 6) = H) (– 77) ÷ (+ 11) = I) (− 3). (−15): (−1 − 2) = J) 500: (3 − 23) = K) (– 750): (−11 + 21) = L) (+ 15) ÷ (−4 + 1) = M) (+ 20) ÷ (– 3 − 2) =

* calculos pfv

Answer 1

Poxa, só 5 pontos ;-;